Method and apparatus for positioning finger on touch panel in wet state, and touch detection apparatus

An apparatus for positioning a finger on a touch panel in a wet state, comprising:

• a wet region determining module, a condition judging module and a finger positioning module;
• wherein
• the wet region determining module is configured to search out suspect wet region in a spacing coding manner, and determine a wet region in the suspect wet region in a self-capacitive coding manner;
• the condition judging module is configured to traverse detection channels on the entire touch panel in the self-capacitive coding manner, and judge whether the detection channels in the wet region satisfy a first condition;
• and
• the finger positioning module is configured to:
• if the detection channels in the wet region satisfy the first condition, determine a relative position relationship between a touch position of a finger and the wet region based on variations of feature data differences of the detection channels on the entire touch panel;
• or if the detection channels in the wet region do not satisfy the first condition, determine a relative position relationship between a touch position of a finger and the wet region based on variations of feature data differences of the detection channels outside the wet region.

A touch detection apparatus, comprising:

• a touch chip and a capacitor array network;
• wherein
• the touch chip is configured to:
• search out a suspect wet region in a spacing coding manner, and determine a wet region from the suspect wet region in a self-capacitive coding manner;
• traverse detection channels on the capacitor array network in the self-capacitive coding manner, and judge whether the detection channels in the wet region satisfy a first condition;
• and
• if the detection channels in the wet region satisfy the first condition, determine a relative position relationship between a touch position of a finger and the wet region based on variations of feature data differences of the detection channels on the entire touch panel;
• or
• if the detection channels in the wet region do not satisfy the first condition, determine a relative position relationship between the touch position of the finger and the wet region based on variations of feature data differences of the detection channels outside the wet region.